If you are connecting from DisplayPort to HDMI/VGA/DVI, please make sure to use an active adapter. Otherwise, please check your cable and make sure that it is using DP 1.2 or higher.

If your monitor connecting to the DisplayPort interface on CalDigit’s Thunderbolt 3 Dock has no video output, please check the monitor input settings (from OSD menu if there is one) and cable/adapter connections. Also to connect in between CalDigit’s Dock and your computer, please use CalDigit’s Thunderbolt 3 cable, NOT Apple’s USB-C 2m white charging cable.

For DisplayPort -> DisplayPort or DisplayPort -> mini DisplayPort monitor: Please make sure that you are using a high quality cable such as DisplayPort 1.2 cable to carry signal between your Thunderbolt 3 dock and your display.

For DisplayPort -> HDMI monitor or TV: Please make sure to use an active DisplayPort to HDMI adapter or cable. Regular passive cable or adapter does not work.

For DisplayPort -> DVI monitor: Please make sure to use an active DisplayPort to DVI adapter or cable.

For DisplayPort -> Dual-Link DVI monitor: Please make sure to use a regular DisplayPort to mini DisplayPort (mDP) dongle, then connect that dongle to Apple’s mini DisplayPort to Dual-Link DVI Adapter then connect to a DVI-D monitor.

Monitors that operate at higher resolutions than 1920 x 1200 require Dual-Link DVI adapter. For example: Apple Cinema HD Display (M9179LL/A) and NEC LCD3090WQXI.

For DisplayPort -> VGA monitor: Please make sure to use an active DisplayPort to VGA adapter or cable.

Additional Information:
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Adapters for connecting devices to the Thunderbolt 3 (USB-C) port on your Mac
Video is not working out of USB-C port?